diff --git a/angular-json-rpc.js b/angular-json-rpc.js
index 49eb30e..0c42c2c 100644
--- a/angular-json-rpc.js
+++ b/angular-json-rpc.js
@@ -4,64 +4,59 @@ angular.module('angular-json-rpc', []);
 // spec - http://www.jsonrpc.org/specification
 //
 var jsonRpc = angular.module('angular-json-rpc', []).factory("jsonRpc", ['$http', function($http) {
-	this.version = "2.0";
+this.version = "2.0";
+    this.url = null;
 
-	this.url = null;
+    // setup rpc
+    this.setup = function (params) {
+        // check params
+        check_params(params);
+        this.url = params.url;
+        return this;
+    }
 
-	//
-	// setup rpc
-	//
-	this.setup = function(params){
-		// check params
-		check_params(params);
-		this.url = params.url;
-		return this;
-	}
 
+    success = function (data, status, headers, config) {
 
-	success = function(data, status, headers, config){
+    }
 
-	}
+    error = function (data, status, headers, config) {
 
-	error = function(data, status, headers, config){
+    }
 
-	}
-
-	//
-	// json-rpc request
-	//
-	this.request = function(method, options){
-		if(options === undefined) 
-        	options = { id: 1 };
+    // json-rpc request
+    this.request = function (method, options, successCallback, errorCallback) {
+        if (options === undefined)
+            options = { id: 1 };
 
         if (options.id === undefined)
-        	options.id = 1;
+            options.id = 1;
 
         // make request
-        var bodyRequest = JSON.stringify({"jsonrpc": this.version, "method": method, "params": options.params, "id" : options.id});
-        var headers = {'Content-Type': 'application/json'};
-        $http({'url': this.url, 'method': 'POST', 'data' : bodyRequest, 'headers': headers})
-        	.success(function (data, status, headers, config){
-        		return data;
+        var bodyRequest = JSON.stringify({ "jsonrpc": this.version, "method": method, "params": options.params, "id": options.id });
+        var headers = { 'Content-Type': 'application/json' };
+        $http({ 'url': this.url, 'method': 'POST', 'data': bodyRequest, 'headers': headers })
+        	.success(function (data, status, headers, config) {
+        	    successCallback(data);
         	}).error(function (data, status, headers, config) {
-        		return data;
+        	    errorCallback(data);
         	});
         // return
         return true;
-	}
+    }
 
-	//
-	// Check params
-	//
-	check_params = function(params){
-		if (params == undefined){
-			throw("Wrong params");
-		}
+    //
+    // Check params
+    //
+    check_params = function (params) {
+        if (params == undefined) {
+            throw ("Wrong params");
+        }
 
-		if (typeof(params.url) !== 'string' || params.url == '')
-			throw("Wrong url parameter");
-	}
+        if (typeof (params.url) !== 'string' || params.url == '')
+            throw ("Wrong url parameter");
+    }
 
-	return this;
+    return this;
 
-}]);
\ No newline at end of file
+}]);